TELSAT marKoni FM Transmitter 1.9.5 Client-Side Access Control Bypass


Vendor: TELSAT Srl
Product web page: https://www.markoni.it
Affected version: Markoni-D (Compact) FM Transmitters
                  Markoni-DH (Exciter+Amplifiers) FM Transmitters
                  Markoni-A (Analogue Modulator) FM Transmitters
                  Firmware: 1.9.5
                            1.9.3
                            1.5.9
                            1.4.6
                            1.3.9

Summary: Professional FM transmitters.

Desc: The application implements client-side restrictions that can
be bypassed by editing the HTML source page that enable administrative
operations.

Tested on: GNU/Linux 3.10.53 (armv7l)
           icorem6solox
           lighttpd/1.4.33


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
Macedonian Information Security Research and Development Laboratory
Zero Science Lab - https://www.zeroscience.mk - @zeroscience


Advisory ID: ZSL-2024-5810
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2024-5810.php


10.11.2023

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These few JavaScript functions can be called directly in the browser's console
and can enable a user to execute and apply modifications with admin rights.
There are plenty more functions throughout the web application's interface.

set_wget()
change_ip_settings()
change_web_port()
set_sendtime()
add_mailaddress()
set_mailinglist()
...
...